INGREDIENTS
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1 lb. ground beef
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15-oz. can tomato sauce
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1-1/4 oz. pkg. taco seasoning mix
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3 c. elbow macaroni, cooked
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8-oz. container sour cream
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1 c. shredded Cheddar cheese, divided
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1/4 c. grated Parmesan cheese
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Garnish: chopped green onions